Sherlock Holmes is a creature and a wizard. He's married to muggle John Watson. They have four kids, two of which are twins. Harry Potter and Draco Malfoy are his parents.
Oh yeah, and he likes solving crimes, bees, and John. That pretty much sums up the entire idea here.
The Sherlock!Wizardverse is a crossover AU of Harry Potter and BBC!Sherlock, obviously. And is written by two very odd people who occasionally have rather odd ideas about things.